Typewriting machine



INVENTOR E. E. BARNEY TYPEWRITING MACHINE Flled July 5. 1924 March 29 1927.

Patented Mar. 29, 1927.

UNITED STTES PATENT OFFIQE.

EDWIN E. BARNEY, OF NEW ROCHELLE, NEW YORK, ASSIGNOR TO REMINGTON TYPE- VRITER COMIPANY, OF IINIION, NEW YORK, A CORPORATION OF NEW YORK.

TYPEWRITING MACHINE.

Application filed July 5, 1924. Serial No. 724,187.

My invention relates to paper feed release and lock-off mechanism for typewriting machines, and has for its object to provide new and improved mechanism of the character stated.

To the above and other ends which will hereinafter appear, my invention consists in the features of construction, combinations of devices and arrangements of parts hereinafter described and particularly pointed out in the claims.

In the accompanying drawings,

Figure l is a fragmentary, front-to-rear vertical sectional View showing the carriage, platen and paper feed mechanism of a No. 10 Remington typewriting machine embodying my invention.

Figure 2 is a corresponding view but omitting some parts and showing other parts in different relationships.

Figure 3 is a fragmentary front elevation showing part of the feed roll mechanis with the novel release mechanism.

Figure 4: is a fragmentary enlarged detail View.

Figure 5 is a fragmentary view showing the release mechanism in a position intermediate the normal and lock-off positions.

The carriage of the Remington typewriting machine to which my invention is shown as applied, comprises a rectangular truck composed of end barsl and connecting front and rear bars, the rear bar 2 alone being shown herein. The front and rear bars are grooved to co-operate through anti-friction rollers 3 with correspondingly grooved front and rear trackways, the rear trackway a of which is fixed to the rear part of the top plate 5 of the main frame, as shown in Fig. l. Mounted on the truck is a platen framecomprising end bars 6 having rearward extensions 7 which are connected by a tie-rod 8, the lower portion of the end bars being connected by a cross bar 9. On the platen frame is a rotary platen 10. lhe bar 9 extends lengthwise of the platen at its under side, and secured at intervals along said bar by screws 11 are angular members or brackets 12, each comprising a rearward horizontally extending portion 13 and a vertically disposed portion or arm 14. A cross rod 15 connects the brackets 12 back of the bar 9 and provides a support for threearmed members 16 which are pivotally mounted on the rod 15. Each member 16 comprises an upwardly extending arm 17, a downwardly extending arm 18 and a forwardly extending arm 19. Pivoted to each forwardlyextending arm 19 at 20 is a rocking member or cradle 21, the rearwardly extending arms of the cradles supporting a shaft or rod 22, by which are carried sections 23 comprising the main feed roller. The forward arms of'the cradles 21 have mounted on them the shaft 24 of the supplementary feed roller which comprises sections 25. The main feed roller 23 co-operates with the platen at its rear side and the secondary feed roller 25 co-operates with the platen at its lower forward side, the feed rollers, or paper feeding devices being maintained normally in spring-pressed relationship with the platen by draw springs 26, each connected at its rear to the downwardly extending arm 18 of one of the members 16, the front ends of the springs being anchored to the cross bar 9. The parts thus far described are common to the Remington typewriting machine and require no extended description or explanation.

In carrying out my invention I make use of the usual release rock shaft 27 which is pivotally supported in bearing openings in the tops of the bracket arms 14;, the re duced end portions 27 of said shaft bearing in the end bars 6. Secured to said rock shaft by set screws 28 are releasing fingers or lugs 29, said fingers extending downward and terminating behind and in register with the upper end portions of the arms 17 of-the three-armed members 16 so that; when the shaft 27 is rocked and the fingers 29 swung forward, they will act against the arms 17 to swing the members 16 on the shaft 15, overcoming the springs 26 and carrying the feed rollers -23 and 25 away from the platen to the released position, as illustrated in Figure 2. My invention is more particularly concerned with the means for rocking the shaft 27 to accomplish this result, and also to lock off the feed rollers. To this end there is mounted on the left-hand end portion of the rock shaft 2'? inside the left-hand end bar 6 a crank arm 30. The crank arm extends upward and rearward from the rock shaft 27 and is provided with an enlargement or hub portion 31 which receives a set'screw 32 that co-operates with the shaft 27 to hold the crank arm 30 in fixed relationship therewith. As best appears from Fig. 4, the free end of the crank arm terminates in an outwardly extending bearing portion 33 on which is mounted a lever member 34 com prising a hub portion 35, an upwardly extending arm 36 and a shorter downwardly extending arm 37. The hub portion is perforated to fit over and bear on the portion 33 of the crank. A headed screw 38, secured in the end of the crank portion 33, co-operates with the hub 35 to prevent outward displacement of the member 34, while a shoulder 39 formed at the junction of the bearing portion 33 with the body of the crank prevents rightward displacement lengthwise of the bearing 33 while at the same time permitting the member 34 to turn freely on the bearing. Preferably the arm 36 of the lever member 34 is broadened at its upper end and shaped-as indicated at 40 to serve as a convenient linger piece. The short arm 87 is slotted as indicated at 41 to receive an antifriction roller 42 rota tably mounted on a pin 43 which bridges the slot 4l'and is spread or upset at its end to retain it in place. The roller 42 is adapted to co-operate with a guide or track memher or cam device preferably in the form of an angular U-shaped piece 44 that is detachably mounted on the platen frame. The roller or contact 42 is preferably employed to lessen friction but the part or member 34 may contact directly with the piece 44. The end portions 45 and 46 are splayed or enlarged and formed with elongated holes or slotways indicated at 47 to receive headed screws 48 whereby the cam piece or member 44 is detachably and adjustably secured to the inner face of the extension 7 of the left h'and end bar 6. The inner edge of the member 44 is shaped at its forward side to adapt it for co-operation with the roller 42, said edge being provided with two depressions 49 and 50 which are separated by an intervening projecting portion or hump 51. Normally the roller or detent 42is adapted to co-operate loosely with the depression 49, as illustrated in Figure 1 from which it will be observed that the lever member 34 is normally positioned by the engagement of the roller with the top of the part 7 of the end bar. The construction is such thatthe action of the springs 26 in maintaining the feed rollers 23 and 25 in spring pressed engagement with the platen under normal. conditions is not interfered with. On the other hand the roller is adapted to interseat closely or snugly with the depression 50 when the feed rollers are thrown oft as shown in Fig. 2 and thus to maintain the feed rollers locked off in ineffective position. i

In operation, assuming the parts to be in normal position as illustrated in Figure 1 and that it is desired to release the feed rollers and hold them locked off, the operator presses rearward against the finger piece 40, causing a pivotal movement of the lever 34 on the center 33 and bringing theroller 42 against the inner edge of the member 44, the roller contacting with the depression 49 and the lever, as backward pressure against the linger piece 40 is continued, reacting against the abutment or member 44 which is relatively stationary to cam rearward the crank arm 30 on which said lever is mounted. The rearward movement of the crank ar-m rocks the shaft 27 and causes the fingers 29 to act against the arms 17 of the'three armed members 16, rocking said members on the axis 15, overcoming the springs 26 and releasing the feed rollers 23 and 25. During the course of the rearward movement of the lever 34and the crank 30, the roller 42 will pass over the projection or hump 51 and enter the depression 50 interlocking therewith so as to maintain the feed roll devices released as'shown in Fig. 2. To restore the parts to normal position it is only necessary to pull forward on the finger piece 40, causing the roller 42 todisengage from the depression 50 and pass downward over the projecting hump :or edge portion. By reason of the screw and slot connection 47, 48,the member 44 may be accurately adjusted for co-operation with the roller 42.

It is possible temporarily or momentarily to release the feed rollers without bringing the interlock into use by an operation 'illus trated graphically in Fig. 5. To 'this end the operator may grasp the finger. piece 40 and press back against it until the. feed rollers are released and the detent roller 42 is in contact with the curved portion or hump 51 but has not been moved far enough to engage with the seat 50. This partial release is sufficient to free thefeed rollers from operative engagement with the platen and to permit insertion or removal of sheet so long as the operator holds the finger piece in the Fig. 5 position. On releasingthe finger piece the parts will return to the normal or Fig. 1 position. i

It will be seen that the operation of releasing the paper feeding members or feed rollers is effected by rearward pressure applied to the finger piece 40 and that the finger piece and thewarm 36 move in the direction of release and also thatthe lock-off is automatically effected. The construction is such that the releasing operation and lockoff' of the feed rollers are particularly smooth, easy and effective.

It will be observed that by the presentinvention there is provided paper feed or feed roll releasing mechanism comprising a re lease rock shaft, as 27, and a jointed finger piece supported thereon and composed as herein shown of the crank 30 and the lever member 34:; that the release rock shaft has a crank arm fixed thereto and that a key is pivoted thereon; that the key is part of a key member on which is also mounted a detent device or roller 42; that the key member in the present instance is a lever, one arm of which serves or is provided with a finger piece portion and the other arm of which mounts a detent or roller device; and that a cam plate is provided with which the roller 42 co-operates to release the feed rollers and maintain them locked off.

Various changes may be made without departing from my invention.

hat I claim as new and desire to by Letters Patent is:

1. In a typewriting machine, the combination of a platen, a pressure roll cooperative therewith, a release rock shaft, a train of releasing devices connecting said rock shaft with said pressure roll, a crank arm fixed to said rock shaft, a release key lever of the first order fulcrumed directly on said crank arm, and a part with which said lever coacts.

2. In a typewriting machine, the combination of a platen, a pressure roll cooperative therewith, a release rock shaft, a train of releasing devices connecting said rock shaft with said pressure roll, a crank arm on said rock shaft, a key member pivoted on said crank arm and provided with a contact, and a relatively stationary part with which said contact is adapted to engage.

In a typewriting machine, the combination of a platen, a pressure roll cooperative therewith, a release rock shaft, a train of devices connecting said rock shaft with said pressure roll, a crank arm on said rock shaft, a key member pivoted. on said crank arm, and a detent device movably sitipported on said key member.

a. In a typewriting machine, the combination of a platen, a pressure roll cooperative therewith, a release rock shaft, a train of releasing devices connecting said rock shaft with said pressure roll, a crank arm on said rock shaft, a lever member pivoted on said crank arm, one arm of said member serving as a finger piece, a detent device mounted on the other arm of said lever member and movable therewith, and a relatively fixed detent element with which the movable detent device is adapted to cooperate both in the normal and released positions of the feed roll.

lhe combination of a platen, a paper feed roller, means for supporting and moviug said feed roller to and from said platen, a release rock shaft, a device extending down from said rock shaft to said feed roller supporting and moving means, a crank arm extending upwardly from said release rock shaft, a release key lever of the first- SGCHTB order pivotally mounted on said upwardly extending crank arm, and a fixed member with which the lower arm of said release key lever cooperates.

6. The combination of a platen; a pair of feed rollers. arranged below the center thereof, one rearwardly and the other forwardly a mounting for said feed rollers; a three-armed lever, one arm extending horizontally to connect with said mounting, another arm extending downwardly, a spring connected to said last mentioned arm, and a third arm extending upwardly; a release rock shaft provided with a downwardly extended device to contact with said upwardly extending arm of said three-armed lever; an upwardly extending crank arm attached to said release rock shaft; a release lever of the first order pivoted to said crank arm; and a fixedly attached cam plate to cooperate with said release lever.

7. Feed roll release mechanism for type writing machines comprising a release rock shaft, a crank arm fixed thereto, a part pivoted on said crank arm and provided with a finger piece, and a guide plate with which said part cooperates to turn the crank arm and the release shaft, said guide plate being provided with a seat or depression co-operative with said part to maintain said crank arm and said shaft in released position.

8. In a typewriting machine, the combination of a platen, a platen frame, a paper feeding device mounted on the platen frame and co-operative with said platen, and means for releasing said device comprising a shaft, alever supported thereby, and a cam with which one end of said lever co-acts when the other end is pressed by hand, said cam being formed with a seat or depression to co-operate with said lever to maintain the paper feeding device in released position.

9. In a typewriting machine, the combination of a platen, a platen frame, a paper feeding device mounted on the platen frame and cooperative with said platen, means for releasing said device comprising a lever, and an angular cam plate adjustably mounted on said platen frame, the lever co-acting with said cam plate when pressed by hand.

10. In a typewriting machine, the combination of a platen, a platen frame, a spring pressed feed roller device co-operative with said platen and mounted on said platen frame, and means for releasing said feed roller device comprising a hand controlled roller detent and a member mounted on the platen frame and with which said detent cooperates, said member being formed with a depression or dwell co-operative with said detent to maintain the feed roller device in released position.

11. In a typewriting machine, the combination of a platen; a platen frame; a paper Ill) feeding device co-operative with said platen and mounted on said platen frame; and means for releasing said device comprising a hand controlled member and a guide mounted on the platen frame with which said member eo-operates, said guide being formed with two depressions, one co-operative with said member when said paper feeding device is engaged with the platen and the other depression co-operating with said member when said paper feeding device is in released. position.

12. 111 a typewriting machine, the combination of a platen; a platen frame; a spring pressed paper feeding device n-operative with said platen and mounted. on said frame;

and means forrel ea'sing said paper feeding device comprising a rock shaft, a member pivotally supported from said crank man, an antifrietion r'ol'ler mounted on said member, and a combined cam and locking piece en said platen frame, said roller reacting against said piece to release said paper feeding device when said member is pressed rearward, the roller also co-acting With said piece to holdthe" paper feeding device locked off in released position.

igned at the borough of Manhattan, city of New York, in the county of New York and State of New York, this 3rd day of July, A. .D. 19245.

EDlVI'N E. BARNEY. 

